* Photoautotrophs: These organisms use sunlight as their energy source and convert it into chemical energy through photosynthesis. Examples include plants, algae, and some bacteria (like cyanobacteria).
* Chemoautotrophs: These organisms use energy from inorganic chemical reactions, like the oxidation of sulfur or iron, to produce their own food. Many chemoautotrophs are found in extreme environments like deep-sea vents or hot springs.
So, the answer to your question depends on what you mean by "self-feeder":
* If you mean "self-feeder" as a general term for autotrophs, then both photoautotrophic bacteria (like cyanobacteria) and chemoautotrophic bacteria are examples.
* If you mean "self-feeder" specifically referring to organisms that use sunlight as their energy source, then photoautotrophic bacteria (like cyanobacteria) are the answer.
